Amplifier



FIG. 1 is a perspective view of an amplifier showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left-side view thereof; and,

FIG. 7 is a right-side view thereof.

The broken lines are for environmental purposes only and do not form anypart of the claimed design.

CLAIM The ornamental design of the amplifier, as shown and described.